That of course does not mean that the barter could not have been a proto economy in some parts of the world, but it also shows that the reality is much more interesting and complex, and that people are highly creative. So I highly recommend Graeber for his anarchistic creativity, even though I accept that his fews are limited by his ideology, which is the case for anymof us. I mean Selgin also does not see Bitcoin as money, so he is far from perfect: )